GPS Renewables, a full-stack biofuels firm offering technology and project solutions for climate-positive biofuel projects, and its subsidiary Proweps, have entered into an exclusive partnership with Germany-based Biogastechnik Süd GmbH (BGTS) to introduce Advanced Paddle Agitators (mixers) under their brand Varibull to India. This partnership aims to improve operational efficiency of biogas plants and reduce costs for Indian CBG (Compressed Biogas) Developers.
Currently, most CBG developers use conventional agitators – mechanical devices that mix organic waste and water within anaerobic digester. These consume more power and are inefficient in handling high fibrous substrates like paddy straw or Napier grass often leading to operational challenges such as poor mixing, crust formation and deposits inside biogas digesters. These inefficiencies are addressed by the Varibull Paddle Agitator, developed by Biogastechnik Süd in Germany. It offers high mixing efficiency, better handling of difficult substrates and significantly lower power consumption.
The agitator will be manufactured at GPS Renewables’ facility in Bengaluru and it will be offered competitively than currently available conventional biogas equipment. The company also plans to explore exports from India to other markets as part of its larger goal of making advanced biogas technologies easily accessible.
Rajesh Ayyappasur, Director – Business Development & Partnerships at GPS Renewables, said, “At GPS Renewables, our focus has always been on introducing innovative technologies that can categorically address challenges in biogas production in India. We do this either through our in-house solutions or through collaborations with global experts. This partnership with Biogastechnik Süd Germany marks a significant milestone for us as we enter into a new product category with the introduction of paddle agitators. Biogastechnik Süd is a pioneer in biogas components, and their Varibull Paddle Agitator is one of the best-selling agitators worldwide, trusted for its durability, low maintenance, and efficiency.”
Mainak Chakraborty, CEO and Co-founder, GPS Renewables, said, “Many Indian CBG plants that rely on conventional agitators face crusting, sediment build-up, uneven mixing, higher power consumption, and frequent breakdowns—challenges that directly impact throughput and reliability. As India’s leading full-stack biofuel firm offering TEPC services and critical process equipment under the OptiMaxx brand, we are committed to solving these issues through global technology partnerships, in-house R&D, and strong execution on the ground. Proven paddle agitators like Varibull from BGTS are purpose-built for tough substrates and will enable efficient mixing, lower energy use, and reliable, low-maintenance operation for CBG developers.”
Gregor Maier, CEO of Biogastechnik Süd, said, “At Biogastechnik Süd, our mission has always been to deliver reliable, efficient and durable technologies that add long-term value to biogas operators worldwide. India is one of the most important growth markets for bioenergy, and we are proud to partner with GPS Renewables, whose strong execution capabilities and deep sector understanding make them the ideal partner for localizing our solutions. The integration of our Varibull Paddle Agitator will help Indian plants maximize performance, reduce downtime, and ensure sustainable operations over decades.”
Robert Ohneberg, International Sales Manager at Biogastechnik Süd, added, “Our products are designed to perform under the toughest operating conditions. Many biogas and CBG plants in India struggle with uneven mixing, sedimentation, and excessive energy consumption. With GPS Renewables, we are confident that we can address these challenges effectively. The Varibull Paddle Agitator has become one of the best-selling agitators worldwide for its robustness, minimal maintenance needs, and efficiency. By bringing it to India, we aim to support developers and operators in achieving higher process stability, greater gas yields, and reduced lifecycle costs.”
Through this partnership, GPS Renewables will distribute and integrate Biogastechnik Süd paddle agitator technology within its turnkey plant solutions and OptiMaxx equipment portfolio, offering Indian CBG developers a proven, future-ready mixing solution.
